This book attempts to conceptualise EU action in the field of regional security. Drawing on constructivist theory, the framework of the book focuses on the meeting - or 'interface' - of actors, a situation reflecting the mutual construction of self, other and situation. The analytical framework applied here to European security politics is potentially open-ended as the theoretical logic that informs the framework is general and abstract in character, and not limited to state actors in an international setting. The empirical aim of this book is to further our understanding of the EU as a...